Study of Simulation on Attenuation of Diesel Oil during Remediation of Contaminated Soil by Enhancing Bioventing

2012 International Conference on Biomedical Engineering and Biotechnology Pub Date : 2012-05-28 DOI:10.1109/ICBEB.2012.373

Jin-Feng Yang, Zhao Tong-ke, Zhang Cheng-jun, Cheng Hong-han

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Abstract

Bioventing is an in situ forced oxidative soil remediation technology which combined soil vapor extraction with biodegradation. It has broad application prospects of soil contamination caused by underground storage tank leakage. In this paper, soil column experiment which was used to simulate diesel contamination was conducted. The law of balance distribution of residual TPH (Total Petroleum Hydrocarbon) concentration at different time and the changes of diesel amount in soil at different depths, together with total diesel amount of the entire column were analyzed. The results showed that: (1) The initial soil moisture content affects the distribution and changes of TPH content during the natural attenuation and enhancing bioventing. (2) Gravity diffusion and migration was the main causes for the changes of TPH content of entire column in the early days of natural attenuation, within one month. Approximately 2 months' venting later, extraction was prominent to maintain stable changes of the diesel concentration in the upper of soil column.

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加强生物通风修复污染土壤过程中柴油衰减模拟研究

生物通风是一种将土壤蒸汽提取与生物降解相结合的原位强制氧化土壤修复技术。地下储罐泄漏引起的土壤污染具有广阔的应用前景。本文进行了模拟柴油机污染的土柱试验。分析了不同时间土壤中残余石油烃(TPH)浓度的平衡分布规律，以及不同深度土壤中柴油含量的变化，以及整个塔的总柴油含量。结果表明:(1)土壤初始含水量影响自然衰减和生物通气增强过程中TPH含量的分布和变化。(2)在自然衰减初期(1个月内)，重力扩散和运移是导致全柱TPH含量变化的主要原因。排气约2个月后，提取作用突出，保持了土壤柱上部柴油浓度的稳定变化。

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2012 International Conference on Biomedical Engineering and Biotechnology

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